Figure 11
Two graphs are presented side by side horizontally. On the left, the graph is labeled “(a) Annual energy summary one of the house”. The vertical axis is labeled “Energy in kilowatt hours”, ranging from 0 to 8000 in increments of 2000. The horizontal axis is labeled “Threshold in kilowatts”, ranging from 0 to 6 in increments of 0.5. The legend shows “Annual imported energy”, “Annual energy use of the heat pump”, and “Annual energy use of the heating element”. The “Annual imported energy” bars begin at (0, 5200), decrease steadily, (1, 4.745), (2, 4.088),and (4, 3.578) end at (6, 3.200). The “Annual energy use of the heat pump” bars begin at (0, 0.073), increase steadily, (1,0.474), (2,0.657), (4,1.168), (5, 1.423) and ends at (6, 1.533). The “Annual energy use of the heating element” dashed line begins at (0, 6.708), decreases steadily (1, 5.876), (2, 5.146), (4, 3.65), (5, 3.029) and ends at (6, 2.482). On the right, the graph is labeled “(b) Annual energy summary two of the house”. The vertical axis is labeled “Annual P V self-consumption slash self-sufficiency”, ranging from 0.0 to 1.0 in increments of 0.1. The horizontal axis is labeled “Threshold in kilowatts”, ranging from 0 to 6 in increments of 0.5. The legend shows “Annual P V self-consumption” and “Annual P V self-sufficiency”. The “Annual P V self-consumption” curve begins at (0, 5.949), (1, 1.624), increases to (2.5, 6.387), (3, 6.391), and decreases to (5, 5.839), (6, 5.547). The “Annual P V self-sufficiency” curve begins at (0, 0.63), (1, 6.825), increases to a peak at (2.5, 7.395), (3, 7.445), and decreases to(5, 7.224), (6, 7.19). Note: All numerical data values are approximated.Annual energy summary of the house with the large DHW and high electrical load profiles at different thresholds (output capacity of the heating element: 2.5 kW, and battery capacity: 10 kWh). Source: Authors' own work